Power-operated saw-set works.



J. McLAREN.

.POWEE OPERATED SAW SET WORKS.

' APPLICATION FILED NOV. 30,1910.

Patented July 11,1911.

| L llll 'l lllllll llv.

COLUMBIA PLANOGRAPH 120., WASHINGTON, D. c.

JAMES MOLAREN, OF VANCOUVER, BRITISH COLUMBIA, CANADA.

POWER-OPERATED SAW-SET WORKS.

Specification of Letters Patent.

Patented July 11, 1911.

Application filed November 30, 1910. Serial No. 594,921.

To all whom it may concemr 'Be it known that I, JAMES MOLAREN, a

citizen of the Dominion of Canada, residing at Vancouver, in theProvince of British Columbia, Canada, have invented a new and usefulPower-Operated Saw-Set Works, of which the following is a specification.

block knees from the saw when it is required to place a new log.

The invention constitutes an improvement of the set works on whichPatent No. 902,994 was granted to me on the 3rd of November, 1908 and myobject has been, to improve in operation and render more simple indesign the principle of the design E there set forth, and so provide apower? operated set works that may be readily; adjusted to automaticallyrelease itself at any desired thickness of set and thatf will rapidlyrecede the head block kneesj when it is required to vplace a fresh logand that will be uniform and reliable in opera-E tion.

the following specification, reference being made to the drawings bywhich it is accomv,

1 at 36. VVlth this mechanism, the movement panied, in which Figure 1 isa side elevation and part sec-f the saw carriage 1s in use, the bevelgears tion of the device, Fig. 2, a sectional plan.

In these drawings 2 represents the upper side of the saw carriage, 3being the shaft extending lengthwise of the carriage and; traveling withit by which the screws 4 of the several head block knees are rotated bybevel gears 5. At the set works mechanismthis shaft 3 is carried inbearings 6 in a sub-base 7 on which the casting 9 is secured whichcarries the remaining mechanism of the set Works.

On the shaft 3 is secured a spur wheel.

around a grooved sheave 19, the arc of contact of the rope on the sheavebeing maintained by idler sheaves 20.

On the inner end of the shaft 16 withinthe frame 9 a double bevel wheel21, 22 is secured, the teeth of the smaller diameter 22 meshing withthose of a bevel gear 23 This invention relates to a power operated iset works such as is used to advance toward the saw the knees of thehead blocks on -which the log to be sawn rests on the carriage, so as tocut any desired thickness; from the log and also to recede the headrotatable in a bearing 24 of the frame, and the teeth of the larger gear21 meshing on the opposite side with those of a bevel gear 25 rotatablein a similar manner in a bearing 26 of the frame. The bearing hubs ofboth these bevel gears are flanged as shown to maintain the gears inposition. These pinions 23 and .25 are rotatable concentric with theaxis of the shaft 14 and are taper bored to conform to oppositelytapered sleeves 30 which are secured to an enlargement of the shaft 14so as to be rotatable with it. The distance apart of the conical sleeves30 is such in relation to the conical bores of the pinions 23 and 25that when in frictional driving contact with one, the other sleeve isclear of contact with the other which is free to rotate independent ofthe shaft. The shaft 14 is endwise moved to bring one sleeve or theother into frictional driving contact with its pinion by a ring 31 in agroove of a shaft 14 which The invention is particularly described inring is pivotally connected to a fork lever 32 fulcrumed at 33 andconnected by a link 34 to a handle lever 35 fulcrumed of the endlessrope 18 being constant while 23 and 25 will be driven in oppositedirections and at the speed required to set or recede the head blockknees, and by the endwise movement of the shaft 14 either one or theother may be connected to drive that shaft according as the taper sleeveof one pinion or the other is thrown into frictional driving contact.The movement of the shaft '14 is imparted through the pinion and wheel11 and 10 to rotate the shaft 3 and from it the several head blockscrews 4 by which the head block knees are advanced or receded.

lVhen the shaft14 is moved to connect its conical sleeve to the settingpinion 23 the object of the invention is to provide a means by whichwhen the head block knee has been advanced a predetermined amount theshaft will be automatically moved to throw it out of frictional contactwith the setting bevel 23 and prevent further movement.

loo

This object is attained by the following means: In alinement with theshaft 14 and adjacent to its end 40 a screw 41 is threaded into a nut 42which is removably secured by cars 46 to the casing frame 9 androtatable on a prolongation of the nut 42 is a bevel gear wheel 43 whichis driven by pinions 44, 45 from the shaft 3, so that while this shaft 3is rotating the bevel wheel 43 is rotating with it preferably at aslower rate. This bevel gear 43 is provided with a serrated driving cone47 onto which three correspondingly serrated clutch projections 48 froma driving head 49 which is endwise slidable on a feather key on areduced end of the screw 41 against the resistance of a spring 50 whichnormally holds the clutch projection of the driving head 49 in contactwith the cone 47.

The driving head is provided with three handles 51 by which the head maybe drawn back from engagement and turned to ad Vance or withdraw thescrew 41 in its nut. The periphery of the driving head 49 is graduatedand numbered to indicate positions corresponding to the amount of set ofthe head block screws and a pointer 52 is secured to the frame andextends toward the periphery of the driving head to facilitateadjustment. By this means the position of the end of the screw 41 inrelation to the adjacent end of the shaft 14 may be readily varied andbeing set at a definite distance from the end of the shaft when themachine is in action that is when the shaft'14 is moved to bring theconical sleeve of the setting pinion 23 into driving contact therewithto rotate the shaft 3 and its cooperative head block screws 4 throughoutthe length of the carriage, the screw 41 will be rotated to move itthrough the nut and when it contacts with the end of the shaft it willendwise move that shaft and release the cone 30 from frictional drivingcontact with the bevel gear 23 through which the head block knees werebeing advanced. That release of the driving mechanism will occur whenthe head block knees have been moved through the distance for which themechanism was set by the graduation on the periphery of the driving head49.

When the log has been wholly cut up and it is required to run back thehead block knees to enable a fresh log to be placed on the carriage thehandle lever 35 is thrown to endwise move the shaft 14 to bring theconical sleeve 30 into driving contact with the receding bevel gear 25when the shaft 3 will be rotated in the opposite direction and at ahigher rate of speed. In this'case the driving head 49 being normally indriving contact with the cone 47 of the bevel gear 43 the screw 41 willbe withdrawn from the end 40 of the shaft 14 and when withdrawn to thefull length the shoulder on the screw 41 where it is reduced to receivethe driving head 49, will endwise move the driving head against theresistance of the spring 50 so that the set mechanism is returned to itszero position while the shaft 3 continues to rotate until the head blockknees are receded a sufficient amount to receive the intended leg whenthe mechanism is thrown out of action by means of the handle lever 35.

It must be understood that the range of the screw 41 does not representthe total range of the head block knees but is made of sufficient lengthfor the maximum size of timber which it is expected will be required tobe cut from a log. In the machine as designed the peripheral graduationof the screw driving head 49 ranges to twelve inches so that a log oflarge size being placed on the head blocks of the carriage and the screw41 withdrawn to its full limit representing twelve inches, when the headblock knees as soon as the machine is started will be moved up towardthe saw and will be automatically disengaged in the manner describedwhen the twelve inch movement has been attained and the same operationmay be repeated until the log is used up. Similarly the gear may be setto any dimension and the setting mechanism will automatically release atthe dimension for which it has been set, thus avoiding the necessity forthe operator moving up the head block knees by hand and watchingcarefully when the desired set has been attained.

The mechanism is simple and direct and is not liable to derangement. Itacts with great uniformity in its release and can be rapidly adjusted byan ineXpert operator.

Having now particularly described my invention and the manner of itsoperation, I hereby declare that what I claim as new and desire to beprotected in by Letters Patent, is:

1. In an automatic set works for a saw carriage, the combination withthe mechanism by which the several head block knees of the carriage arepower operated, of means for automatically disconnecting the mechanismsaid means comprising, a nut fixed to the frame adjacent to thedisconnecting clutch, a screw rotatable in the nut with the head blockoperating mechanism and means for adjusting the distance between the endof the screw and the clutch contact.

2. In a device of the class described, the combination with themechanism by which the several head block knees of the carriage arepower operated and a conical clutch by which such operating mechanismmay be disconnected, of a nut fixed to the frame of the machine adjacentto the clutch, a screw rotatable in the nut with the set worksmechanism, of means for releasing the nut screw from the mechanism bywhich it is rotated and for independently rotating that screw.

3. In a device of the class described, the combination of the mechanismby which the several head block knees are operated from an endless wirerope, means for clutching the driving mechanism to an operating shaftsaid means comprising a cone secured to the shaft which cone fits acorresponding bore in one of the driving wheels, means for automaticallydisconnecting the driving mechanism when a predetermined movement of thehead block knees has been attained said means comprising a screwrotatable in a fixed nut adjacent to the end of the shaft on which isthe clutching cone said screw being driven from the mechanism whichoperates the head block screws, and means for adjusting the end of thescrew in relation to the end of the shaft on which is the clutchingcone.

4. In a device of the class described, the combination with a mechanismby which the several head block knees are simultaneously operated froman endless wire rope means for disconnecting the mechanism sai meanscomprising an endwise movable shaft having a friction cone which fitsinto a corresponding cone in one of the driving gears, means forautomatically disengaging the friction cone from driving contact 'saidmeans comprising a screw rotatable in a fixed nut in proximity to thesmaller end of the cone said screw being driven from the mechanism whichoperates the head block screws, means for disconnecting the screw fromthe mechanism by which it is driven and for rotating it independentthereof and graduations on the periphery of thescrew turning gear and afixed pointer adjacent to such graduation.

5. In an automatic set works of the class described, the combinationwith an operating mechanism by which the head block screws aresimultaneously rotated, of an endless rope traveling lengthwise of thecarriage, a grooved sheave mounted so as to be in driving contact withthe rope and secured to a shaft on which is a double bevel wheel, abevel gear rotatably mounted to be in mesh on opposite sides of thewheel with the teeth of the double gear, a shaft concentric with the twobevel gears and having oppositely coned enlargements to engagecorresponding bores in the wheels, a pinion secured to one end of theshaft and meshing with the teeth of a wheel on the head screw operatingshaft, levers by which endwise movement may be imparted to the coneshaft, a screw rotatable in a nut in alinement with the cone shaft whichscrew toward one limit of its movement will contact with the end of thecone shaft andforce its cone out of frictional driving con tact with thebevel wheel through which it passes, means for driving the screw fromthe shaft which operates the head block screws, means for disconnectingsuch driv-- JAMES MGLAREN.

Witnesses ROWLAND BRITTAIN, WILLIAM S. SOUTAR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

